Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production
Two perturbations were investigated in acidogenic co-fermentation of waste activated sludge (WAS) and food waste in continuous mesophilic fermenters: increasing the organic loading rate (OLR) and changing the WAS. A control reactor maintained an OLR of 11 gVS/(L·d), while a test reactor had a prolon...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Universidad de Oviedo (UNIOVI) |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/225054 |
| Acceso en línea: | https://hdl.handle.net/2445/225054 |
| Access Level: | acceso abierto |
| Palabra clave: | Bioreactors Metabolisme microbià Microbial metabolism |
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Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production Perez-Esteban, N. Vives-Egea, Júlia Dosta Parras, Joan Astals Garcia, Sergi Peces, Miriam Bioreactors Metabolisme microbià Microbial metabolism Two perturbations were investigated in acidogenic co-fermentation of waste activated sludge (WAS) and food waste in continuous mesophilic fermenters: increasing the organic loading rate (OLR) and changing the WAS. A control reactor maintained an OLR of 11 gVS/(L·d), while a test reactor had a prolonged OLR change to 18 gVS/(L·d). For each OLR, two WAS were studied. The change in OLR led to differentiated fermentation product profile without compromising the fermentation yields (∼300 mgCOD/gVS). At 11 gVS/(L·d), the product profile was dominated by acetic, butyric, and propionic acids while at 18 gVS/(L·d) it shifted to acetic acid, ethanol, and caproic acid. Reverting the OLR also reverted the fermentation profile. The biomass immigration with the WAS changed the fermentation microbial structure and introduced acetic acid-consuming methanogens, which growth was only delayed by the OLR increase. Microbial monitoring and post-fermentation tests can be used for early detection of acetic acid-consuming events. Elsevier B.V. https://hdl.handle.net/2445/225054 |
| title |
Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production |
| spellingShingle |
Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production Perez-Esteban, N. Bioreactors Metabolisme microbià Microbial metabolism |
| title_short |
Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production |
| title_full |
Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production |
| title_fullStr |
Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production |
| title_full_unstemmed |
Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production |
| title_sort |
Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production |
| author |
Perez-Esteban, N. |
| author_facet |
Perez-Esteban, N. Vives-Egea, Júlia Dosta Parras, Joan Astals Garcia, Sergi Peces, Miriam |
| author_role |
author |
| author2 |
Vives-Egea, Júlia Dosta Parras, Joan Astals Garcia, Sergi Peces, Miriam |
| author2_role |
author author author author |
| topic |
Bioreactors Metabolisme microbià Microbial metabolism |
| topic_facet |
Bioreactors Metabolisme microbià Microbial metabolism |
| description |
Two perturbations were investigated in acidogenic co-fermentation of waste activated sludge (WAS) and food waste in continuous mesophilic fermenters: increasing the organic loading rate (OLR) and changing the WAS. A control reactor maintained an OLR of 11 gVS/(L·d), while a test reactor had a prolonged OLR change to 18 gVS/(L·d). For each OLR, two WAS were studied. The change in OLR led to differentiated fermentation product profile without compromising the fermentation yields (∼300 mgCOD/gVS). At 11 gVS/(L·d), the product profile was dominated by acetic, butyric, and propionic acids while at 18 gVS/(L·d) it shifted to acetic acid, ethanol, and caproic acid. Reverting the OLR also reverted the fermentation profile. The biomass immigration with the WAS changed the fermentation microbial structure and introduced acetic acid-consuming methanogens, which growth was only delayed by the OLR increase. Microbial monitoring and post-fermentation tests can be used for early detection of acetic acid-consuming events. |
| publishDate |
2024 |
| format |
article |
| status_str |
acceptedVersion |
| url |
https://hdl.handle.net/2445/225054 |
| eu_rights_str_mv |
openAccess |
| publisher |
Elsevier B.V. |
| institution |
Universidad de Oviedo (UNIOVI) |
| collection |
Dipòsit Digital de la UB |
| reponame_str |
Dipòsit Digital de la UB |
| instname_str |
Universidad de Oviedo (UNIOVI) |
| _version_ |
1878433031507673088 |
| publishDateSort |
2024 |
| author_browse |
Astals Garcia, Sergi Dosta Parras, Joan Peces, Miriam Perez-Esteban, N. Vives-Egea, Júlia |
| publisherStr |
Elsevier B.V. |
| score |
6.924472 |